UPD6467 datasheet(3/68 Pages) NEC

Part #	UPD6467

Description	ON-SCREEN CHARACTER DISPLAY CMOS IC FOR 512-CHARACTER, 12-ROW, 28-COLUMN, CAMERA-CONTAINED VCR

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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3 / 68 page

BLOCK DIAGRAM

Remark

Signals in ( ) are set by using an initial status setting command (RGB + RGB compatible blanking).

CMDCT

Data input shift

register

DATA

CLK

CS

Instruction decoder

Control signals

Display

control

register

Character size

register

Horizontal

address

register

Write

address

counter

Horizontal size

counter

Horizontal

position

counter

Horizontal

address

counter

Vertical

address

register

Oscilla-

tion

circuit

Synchro-

nization

protection

circuit

TEST

VDD

GND

PCL

Character

data

9 bits

×

336 words

Color

data

3 bits

×

336 words

Blink

data

1 bit

×

336 words

Reverse

data

1 bit

×

336 words

Output

specification

data 1 bit

×

336 words

Video RAM

Back-

ground

control

data

register

Hsync

Vsync

Vertical

position

counter

Vertical size

counter

Output controller

VR

VBLK

VB

VG

BLK2

VC2

BLK1

VC1

(GBLK)

(RBLK)

(BBLK)

Character

generator

ROM

12

×18 bits

×

512 words

OSCIN

OSCOUT

Vertical

address

counter

9

5

10

4

6

3

1

2

8

7

20

19

16 17 18 15

12 11

14 13

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UPD6467 Datasheet(PDF) 3 Page - NEC

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